Design of Wideband Filtering Antenna Based on Metasurface
In this paper,a wideband filtering antenna is proposed based on metasurface.By dividing the 3×3 metasurface,a new reso-nance is introduced to improve the impedance matching bandwidth.In addition,by adding a step impedance resonator(SIR)to the feed line,a radiation zero is introduced on each of two sides of the working band.Moreover,a new resonance is introduced into the high frequency band of the passband,causing the bandwidth to be further widened.In addition,in order to improve the selectivity of the low frequency,a new radiation zero is introduced by etching four central symmetric U-shaped DGS on the ground.Simulated re-sults show that the designed filtering antenna has the fractional bandwidth of 33.1%(4.93 GHz—6.88 GHz)for S11<-10 dB,and has four radiation zeros at 4.06 GHz,4.4 GHz,7.5 GHz and 8.75 GHz,respectively.
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